SUNSET: 
From the Sun to the Stars, Astronomy in Photos
New observations reveal turbulent flows in the supernova remnant Cassiopeia A and in the solar corona.
Mars Might Have a Surprisingly Large, Solid Core, Marsquakes Reveal
Marsquakes reveal a lumpy, viscous mantle and a large, solid inner core, with profound implications for Mars past, present, and future.
The Serpentine Apep Nebula, Imaged by the Webb Telescope
The James Webb Space Telescope shows intriguing new details in the Apep Nebula, created by the colliding winds of two dying stars.
No Evidence for Atmosphere on Trappist-1d
New James Webb Space Telescope observations of the third world in the seven-planet TRAPPIST-1 system rule out a variety of atmospheres.
Astronomers Map the Cosmic Web
A 23 million light-year-long gaseous filament and 39 bursts of radio waves are helping astronomers chart the universe's largest-scale structures.
Never-Before-Seen Views of the Sun
New observatories in space and on the ground are providing us with our best views yet of the Sun — providing insight into puzzles that have remained unsolved for decades.
Mystery Object in the Milky Way
Astronomers have found X-rays coming from a strange object that releases regular bursts of radio waves, shedding new light on what that object might be.
Sharpest Images Yet of the Sun's Corona [VIDEOS]
New adaptive optics technology has resulted in the sharpest views yet of the solar corona.
Barred Spiral Galaxy Discovered in the Early Universe
The discovery of a barred spiral galaxy in a universe just a couple billion years old suggests that galaxies formed and evolved much more quickly than current theories suggest.
A Pulsar Broke a Magnetic Thread in the Milky Way
Mysterious threads dangle in the Milky Way center, and a pulsar has punched through one of them — providing fresh perspective on the threads' origins.
Why Are Most of Andromeda's Dwarf Galaxies On Our Side?
A new look at the galaxies swarming around the Andromeda Galaxy shows that their asymmetric arrangement is rare — and difficult to explain.
Supermassive Black Hole Wakes Up
Regular bursts of high-energy X-rays might herald the birth of active galactic nuclei, the supermassive black holes in galaxy cores.
Sky & Telescope Goes to Greenland
Despite inopportune clouds, Sky & Telescope's first tour to Greenland offered unforgettable adventures with enormous icebergs, sled dogs, and more.
Astronomy in Pictures: From Cosmic Lenses to Dust Devils on Mars
Some cosmic perspective is a perfect cure for the Monday blues!
Window into Hot Jupiter Reveals Multilayered Winds
The hot, inflated atmosphere of Jupiter-mass planet WASP-121b undergoes surprising changes under the close heat of its star, new data reveal.
Release of 4,000 Supernovae to Aid Cosmology
A new survey contains 3,628 Type Ia supernovae — the exploding white dwarfs that astronomers use as cosmological toeholds to gauge our expanding universe.
NASA Looks to Industry to Continue VIPER Lunar Rover Mission
The development of the VIPER lunar rover has been discontinued.
Webb Telescope Watches Rippling Dust Shells
After more than a year in production, a new cosmic film, starring the massive star Wolf-Rayet 140, is out.
Black Hole Sprouts Jets in Unprecedented Event
Astronomers have witnessed X-ray rumblings and a powerful plasma “burp” following a supermassive black hole’s meal.
Black Hole Eats One Star, the Remains Pummel a Second One
The crumbs of a supermassive black hole’s stellar meal has revealed the presence of a second star in a close orbit.
